Tube-mill.



0. E. MOGENSEN.

TUBE MILL.

APPLICATION FILED MAR.`21,1912. l 9 l 55,7 l L Patented Nov. 3, 1914.

4 SHEETS--SHEET 1.

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TUBE IIHLL` APPLIGATQLON FILED MAR. 21, 1912. l, Patented Nov. 3, 1914 SHEETSnSHEET 2.

0. E. MOGENSEN.

TUBE MILL.

AFPLIGATION FILED MAR.21, 1912.

Patented Nov. 8, 1914.

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4 SHEETS-SHEET 3.

QQ vgl/Emmi? 4;@ 1 7W v A WIT/VESSES O. E. MOGENSEN.

TUBE MILL.

APPLIGATION FILED 1\IAR.21, 1912.

Nw 3, 19M.

Patented Llll.,

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mom/5m i Plainfield, Union county,

' following isl a specification,

.placed in the earns rarer onlie n. iioennsiin, or rnsiiirrnnn, new innsnr, Assieiion ro r. i.. siviin'rn a oo.,

or new Yann, n. Y., a con POBATION, OF 'NEW' JERSEY.

TUBE-'MILL Specification ci Letters Patent.

lifatented Nov. 3, teilt.

Application lcd March 21, 1912. Serial No. 685.308.

(F0 all whom it may concern:

Be it known that l, OLAF E Mnciiivsiirn a citizen ofthe United States,-`residiiig in State of New .lersey, have vinvented certain new andusetul improvements in Tubedl/lills, of which 'the reference being had to the accompanying drawings, which torni a art hereof. y This invention relates to tube mills which are divided transversely to form two cham-- bers for the reception of grinding bodies ot different-.kinds flint pebbles being usually chamber at the feeding end oi lie.A mill and/mall grinding bodies in the chamber at vthel discharge end of the mill. The partition which vseparates the chambers is usually slotted or otherwise perforated so as to permit the material which has been reduced in the chamber With the flint pebbles to pass through the same into the other chamber, the slots ,or other perforations being so narrow or small as to prevent the smaller griiidino' bodies roiiipassing back ward through t e saine into vthe first chamber.

lt isiound that perforated partitions wear out rapidly and t'is the object of this invention so to improve the construction oi tube mills of this character as to maintain the separation between the two chambers, permit the passage of the reduced material from the irst chamber to the second, and prevent the movement ofthe smaller grinding bodies from the second chamber to the first Withoutl the use of the transverse perforated partitions such as have been employed hitherto.

In accordance with the invention theinill is provided with an imperforate partition between the chambers and circumferential channels are rovided such that the passage of the reduce material from the first chamber to the second is permitted While the passage of the smaller giindin bodies. from the second chamber back to t e first is prevented. f

The invention will be more fully explained hereinafter with reference to the accompanying dravvin s in which are illustrated several embodiments of the invention and in Which-- i l Figure 1 is aiviewin longitudinal section of so much of a tube mill, equipped with the invention, as is necessary to enable the invention to be understood. Fig. 2 is a view in section on thc plane indicated by the line 2 2 of Fig. l, looking in the direction of the arrows. Figs. 3 and 5 are views similar to Fig. l but showing slightly different enibodiments of the invention. Figs. si and 6 are views in transverse section on the jlanes indicated lby the lines 4rd and (346 o Figs.

3 and 5 respectively. Fig. 7 is a developed circumferential section of the circumferential channels shown iii Figs. 5 and 6. Fig. 8 is a developed circumferential section, in detail, illustrating still another arrangement of the channels. Fig. 9 is a detail view iii longitudinal section through a portion of a tube inill, 'with the channels 'arranged as shown inFig. 8. Figs. l0 and 1l are views in longitudinal and transverse Section respectively illustratingr a kfurther modification.

The tube mill to which the invention is applied may be of any usual or suitable construction and is shown in the several. figures of the drawings as comprising cylindrical nietal shell a provided with trunnions o, and suitable wear resisting lining c, and grated discharge openings d for the discharge of the pulver-ized material. The material to be pulverized is fed to the mill through convenient openings c which may be formed in the truiinions h and in which may be suitable feed mechanism here illustrated as a screw and the grinding bodies are introduced into the chambers f and g through any suitable door as usual in mills of this description. ./"it a suitable point within the mill is secured in any suitable manner an imperforate pai'- tition h, preferably nearer the discharge end than the feed end, so that the chamber f, in which are placed the flint pebbles, is considerably larger than the chamber g in which are placed the smaller grinding bodies. ln the wall of the cylinder, in the ggg to prevent-.the return of the sni'eller ,grinding bodies from the second chamber to the'`- vfor each inlet opening Each such @hann nel easing is carried from the openings i to the openingy 7u in direction opposite to the direction of rotation of the cylinder. Y'lhereltore the niateriel 'which enters the channel through the grated openings is carried through the channel, in the rota- -t'ion of the shell and passesinto the chamber g, while such grinding bodies as may in any Way indtheir way into the channel from the chamber g are returned at once, in the continued rotation 01"' the niill, to the chamber g.

ln the arrangement shown in Figs. l and 2 the casings Z a1e"'independent, one of another, b'nt in the arrangement shown in Figs. 3 and 4 the casing E which covers the openings is continuous around the ein onmference of the shell and is provided at. interif'als with delecting plates Z" which direct the material received through the corresponding openings to a. ln'anch channel formed by s. branch f. lsing Zi' tinfongrh which the material passes to the corresponding opening 7c in the chamber g.

In the arrangement shown in Figs. (l and 'Z lthe casing l* is continuons circmn :terentially and covers the openings i and c, being provided with internal partition plates Z5 which fornithe channels from each group ot openings 'i to the correspondingy single opening L. ln this case the openings 7g. are shown ns covered by hoods l which continue the channels in the saine direction, the hoods bring` ogen at their ends.

lin the several arrangements already described, the channels through 'which the materiel is directed frein the openings z' to the openings'f: are formed by exterior casings, hat when the in'iprovenient is applied' to old machines, in which it may be diliicnlt to cut the openings in the shell, the

channels may 'be formed Whollr Within the shell, the lining of which is removed. cirfenmferentinlly so as to permit the continu- `ons casing 7,7, to be placed Within the shell, as shown in Fie. 9. The casing ZT then has the openings e" and 1c formed therein and is provided with partition plates ZS which -orsn the channels' by which the material is directed from the openings-'' .to the open; ings is.

ln the arrangement shown in Figs. l0'

and l1 the openings z' and It are formed in the shell o as before and are covered by an exterior casingl4 provided with partitions Zito Jorin the channels as shown in Figs. 5, 6 and 7. The material is discharged through the openings Ic, however, not di lrectly into the chamber g, as before, but into narrow chambers fm, Which ere formed by radial plates m' between the imperforate partition It and :L seconder;y partition m2. The lat-ter is provided with s central opening m3. A cone m* is secured centrally to a partition h and directs the material from the several chambers m through the central opening m3 into the chamber g.

vVarious other arrangement-s Will suggest themselves, the conditionsof use require.

l claim as my invention l In a tube niill, the combination of a rototahle shell, en iinperfora-te transverse partition therein, said shell having a series of di :hin-ge openings at one side of said partition and a series of inlet openings at the other side o'j said partition, independent eireinn'terential channel casings of reletival)v great length applied to the outer Wall ot the shell, each of said :tsings covering several of the discharge openings to receive the material dii-eetl)r from the shell and ronnnnni ating with a single inlet opening and being-ij extended substantially spirally and uninterrnptodlj' from said dischar e pcnings to said inlet opeiiing.1'espeotive y in a direction opposite to that of the direction. of rotation oi' the shell, whereby the return of material from each of saidv inlet `openings to the respective discharge openings is automatically prevented and the free and uninterrupted flow of material iaeilitated.

rl`his specilication. signed and witnessed this 12th day of llegrch A. E., 1912.

LF E. MGENSEN. Signed in the presence of# v W. B. GREELEY,

'Vtonrnmo'ron CAMPBELL. 

